assume cs:code
data segment
        db 'conversation'
data ends

code segment
        start: mov ax, data
               mov ds, ax
               mov si, 0
               mov cx, 16
               call captial

               mov ax, 4c00h
               int 21h

       captial:and byte ptr [si], 11011111B
               inc si
               loop captial
               ret

code ends
end start
